On Thu, Feb 27, 2020 at 11:43:11AM +0100, Stefano Garzarella wrote:
[ Upstream commit 7143b5ac5750f404ff3a594b34fdf3fc2f99f828 ]
This patch drops 'cur_mm' before calling cond_resched(), to prevent the sq_thread from spinning even when the user process is finished.
Before this patch, if the user process ended without closing the io_uring fd, the sq_thread continues to spin until the 'sq_thread_idle' timeout ends.
In the worst case where the 'sq_thread_idle' parameter is bigger than INT_MAX, the sq_thread will spin forever.
Fixes: 6c271ce2f1d5 ("io_uring: add submission polling") Signed-off-by: Stefano Garzarella sgarzare@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk
fs/io_uring.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
thanks for this, now queued up.
greg k-h